The gang is on their way to Mt. Silver, with Ash's Larvitar napping peacefully in his bag. It wakes up, but Hardens in fear when Misty and Brock talk to it. Ash snuggles Larvitar, promising to protect it from scary trainers like Misty, which leads to criticisms from Brock that Ash is babying it. Misty tells him that he needs to see how it has improved around other Pokémon. At that moment, a very angry wild Ursaring comes out of the scrub and chases the gang away, firing Hyper Beams.
Having lost the Ursaring, the gang stop to catch their breath. Larvitar then wanders over and discovers a hot spring. Brock notices a variety of wild Pokémon sitting serenely in the hot water. Ash walks forward to test the water, but sets off an alarm by breaking a trip wire with his foot. A boy walks out from the growth, calling a challenge to Entei, only to discover the trio. He explains that he has studied all of the recent Entei sightings and determined that it is next due to appear at the springs. He introduces himself as Nelson.
Just then, the Ursaring comes bursting from the scrub, roaring. However, it doesn't pay attention to the group, instead diving into the springs, emerging with a roar of pleasure. Nelson explains that the springs have relaxation and even healing powers on Pokémon. After Nelson leaves to check other sites, Ash releases his Pokémon to enjoy the springs. Totodile goes jogging towards the spring eagerly, but lands on his face when Ash calls for him to wait. Ash introduces his team to Larvitar, who quickly hides shyly. Totodile happily jogs up and seizes Larvitar by the hand and spins it around joyfully. It crashes into Cyndaquil, causing both to freeze in fear. It also does not respond well to Bayleef's cradling or lullaby, and is severely intimidated by Noctowl. Despite Ash's assurance that the group are his and therefore Larvitar's friends, Larvitar bursts into ear splitting tears.
Later on, Larvitar has recovered and appears encouraged by Ash, Misty and Brock's Pokémon (save for his Rock-type Onix and Geodude) enjoying the springs. However, it flinches away when Psyduck flails around in an attempt to swim and gets splashed. Misty attempts to get Psyduck into the springs, but it ends up trapped in hot sand. Brock discovers that it is pleasantly warm, and sends out his Onix and Geodude to enjoy it with Psyduck; Onix promptly buries Psyduck in sand as it makes a bed for itself. Geodude lands behind Larvitar, and shoves the young Rock type head first into the sand. However, Larvitar enjoys the sand and Ash notes that its finally beginning to enjoy itself. Cyndaquil and Totodile start a sand ball fight, but when Togepi hits Larvitar, it does not take it with Totodile's humor and promptly begins to cry again.
Watching close by are Jessie, James and Meowth, with the latter two noting that the last thing they want in Team Rocket is another screamer. However, they plot to steal Larvitar anyway, with Meowth hatching his "At the Bath Fruit Smoothie Plan". Jessie and James pull up in a large truck and recite their motto, before offering the gang free taste test smoothies. Whilst Misty and Brock are suspicious, Ash waves away their suspicions and takes Larvitar, Pikachu and his other Pokémon into the back of the truck. Suddenly the ramp retracts and the door slam shut. Team Rocket speed away, gloating to Misty and Brock.
In the back, Jessie and James slide back a panel and taunt Ash, causing him to realize the deception and plan to break out. However, despite all of his Pokémon's efforts, not even Bayleef makes an impression on the doors. Pikachu then attempts a Thunderbolt, succeeding only in shocking everyone in the back whilst Jessie and James gleefully proclaim that electric attacks are useless in their anti-electrified truck. Cyndaquil and Bayleef continue their attack, succeeding only in making the metal glow. Ash then remembers the hot-cold technique that his Noctowl had taught him, and orders his two starters to alternate attacks until Bayleef's Razor Leaf cleaves straight through the metal. Noctowl then grabs Phanpy and Cyndaquil and flies out, whilst Ash and the others cling to Bayleef, whose vines seize a nearby branch and Ash's group are yanked to safety, with the exception of Larvitar, who Ash drops in midair. It is then caught by a Misdreavus, who returns it to the group. Nelson then runs up, revealing the Misdreavus to be his. Misty and Brock come running to catch up, and they meet Misdreavus, Misty exclaiming it to be pretty. Nelson then challenges Ash to a battle, promising to show of his Pokémon's special move that he claims will help him catch Entei. Team Rocket discover with horror that Ash has escaped.
Brock referees a two on two battle, and Ash's Phanpy volunteers to fight first. Phanpy's Take Down overcomes Misdreavus' Headbutt, and Misdreavus' Swift is blocked by Defense Curl. However, Phanpy's attempt to Rollout dodge Psybeam fails and the attack scores a direct hit, confusing Phanpy. Nelson then reveals his secret attack, Mean Look, which Ash notes doesn't seem to have done anything. On Misty's advice, Ash recalls Phanpy, but the Poké Ball does not recall Phanpy. Nelson explains that Mean Look prevents substitutions in battle, or fleeing in wild Pokémon, and that he plans to use it to capture Entei.
Suddenly, Team Rocket arrives again and swipes Misdreavus in a net. After reciting the motto, they unleash a huge vacuum to suck up all of the water and wild Pokémon in the hot spring. Whilst Brock's Onix shelters the Trainer's Pokémon, and Misty's Staryu escapes the water in time, Brock's Pineco is not quick enough and is sucked up in the vacuum. In despair, Brock leaps into the typhoon of water after his Pokémon, managing to catch Pineco until the Ursaring crashes into him and knocks him away. Pineco is upset by this, and evolves into Forretress, the evolution inducing an explosion of energy that breaks the typhoon, causing Brock, Forretress and the wild Pokémon to land in the water. Bayleef then uses Razor Leaf to break Misdreavus free, allowing it to return to Nelson. In fury, Meowth unleashes the machine at full power, causing the water to shoot up at a tremendous pace and trap Team Rocket in a huge typhoon.
On the outside, Ash and his friends attack the tornado with all of their Pokémon. The wild Pokémon join in with Hyper Beams from Ursaring and Houndoom, Flamethrowers from Houndour and Swifts from Aipom. However, these attacks inflict nothing on the tornado. Suddenly, Nelson's sensors activate, and a colossal Flamethrower comes from the mountains, stopping the typhoon and sending Team Rocket flying. The trio land in front of Entei, who is not sympathetic and unleashes another Flamethrower to send the trio blasting off.
Nelson leads the way to Entei's position, challenging it to a battle. He has Misdreavus use Mean Look to lock Entei's position, and then unleashes Swift and Psybeam. Entei shakes off both attacks and as Misdreavus goes in for a Headbutt, it unleashes a Roar, sending Misdreavus back into its ball and allowing to escape, unhindered by the effects of Mean Look. Nelson sinks to the ground, not having expected such a rebutting tactic. However, he claims that his desire has only increased and that he is determined that he will capture it one day. The trio then leave Nelson and continue on to Mount Silver, with Larvitar having grown accustomed to the company of others (with the exception of Misty).
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