Blasty as a Squirtle being stolen
Green initially stole Blasty as a Squirtle from Professor Oak's Lab. However, he had already evolved into a Wartortle by the time he debuted in Wartortle Wars, being used to try to swim away from Red after conning him, only to be stopped by Red's Snor. When Red confronts Green over the fake items, she feigns an apology and says the only reason that she tricked him was so she could see him again. Grabbing him in a hug, she begs him to forgive her, before pushing him violently away and attacking with Blasty's Bubble attack. Red is ready for this, and leaps onto Snor, bragging that she can't outsmart a Trainer with two Badges before commanding his Pokémon to use a Mega Punch, which levels the pavement and knocks out Green and Blasty.
In Tauros the Tyrant, Green stole a disk from Team Rocket and was hunted down by them. They demand she give it back, and she reacts by coolly tossing the disc into Blasty's mouth and warning Team Rocket that if they attack the disc will be damaged. Team Rocket attack with Machoke and Hitmonlee, but in their attempts to protect the disc whilst also taking down Blasty, the two Pokémon end up injuring each other, much to Green's delight. The highest-ranking member of Team Rocket present loses his patience and calls out his Tauros, a Pokémon that he warns Green was the leader of his herd, King of the Safari Zone, and has the power to control other Pokémon by whipping his three tails. The Tauros commands all of Team Rocket's Pokémon at once, quickly neutralizing Blasty and recovering the disc.
In Zap! Zap! Zapdos!, Blasty was revealed to have evolved into Blastoise. He was first seen battling against Sabrina's Kadabra. Sabrina's Kadabra was able to outmaneuver Blasty with Teleport before knocking him down with Psychic. Sabrina then has Kadabra hold Blasty in a Disable before delivering a blow that shatters his shell. However, Green promptly sends out another Poké Ball, surprising Sabrina when its contents are revealed to be the real Blasty, who strikes Kadabra down with a Mega Punch; the other Blasty revealing itself as Ditty. After this Blasty is used alongside Saur and Blue's Charizard to help defeat Thu-Fi-Zer.
In Just a Spearow Carrier, Blasty is Green's second choice in her battle against Dr. O in the Pokémon League. Much to everyone's amazement Green has Blasty withdraw his forelimbs, letting her ride on his lower legs as he uses Hydro Pump to propel them into the air for an aerial attack, turning the tables on Dr. O. Dr. O has Spearow activate Mirror Move, creating a deflective shield the returns the attack on Blasty and heavily damaging him. As a last-ditch attack, Blasty attacks with Water Gun, but the attack is returned by Mirror Move, defeating Blasty.
In Breath of the Dragonair Part 1, Blasty battled against Bruno's Hitmonlee after a failed attempt to flee. Due to being separated from Green she attempts to convey a command through a distant-commanding device that traps a command inside a bubble. The command-bubble almost reaches Blasty, but is popped by Hitmonlee. Hitmonlee then uses his stretching body to wrap up Blasty. While wrapped up Blasty uses Bubble to hide the next command-bubble. The command reaches Blasty, telling him to punch the foe with his cannons, which knocks Hitmonlee out.
In The Legend, Blasty is used alongside Saur and Blue's Charizard to help Yellow defeat Lance's team.
In The Last Battle IX, it was revealed that Green lent Blasty to Red to assist him on his journey to Mt. Silver, as she alluded she wouldn't need him for aerial transport (now that she had captured the Legendary birds).
In The Last Battle XIV, Blasty participated in the final battle against the Masked Man. After the Masked Man escapes into time, Blasty uses the gas-filled water that he collected from Mt. Silver to melt the ice trapping the Kanto Pokédex Holders.
In Now You See Me..., Blasty battled against Organism No. 1 alongside the rest of Green's team. Due to the DNA Pokémon's speed and invisibility Green's Pokémon are quickly overwhelmed.
In It Takes Patience, Knowledge and a Really Quick Beedrill, Blasty began training to learn the ultimate water attack, Hydro Cannon, and did so even without clearing the Jump Path, Catch Path, and Battle Path. After a series of events Blasty helped to free Mewtwo's M2 Bind along with his newly evolved teammates.
In Storming the Forretress, after Giovanni was defeated and Carr sent the flying airship containing him, his son, his loyal subordinates, and enemies crashing, Blasty and Golduck used Hydro Pump to try to keep the airship in place with Rhydon using Megahorn. However, ultimately, it was Mew who saved it from crashing. After this he was petrified alongside his Trainer.
In The Final Battle VIII, the Kanto Pokédex Holders, Silver, and their Pokémon were freed from their petrified states by the power of Jirachi's wish-granting abilities. Alongside the ten Kanto, Johto, and Hoenn Pokédex holders, Blasty battled against Guile Hideout's fake Kyogre. Together with Silver's Feraligatr and Ruby's Mumu, Blasty attacked with Hydro Cannon to destroy the fake Kyogre.
In Omega Alpha Adventure 11, Blasty and Saur battled Maxie and Archie in order to retrieve the stolen Red and Blue Orbs they took from Bill. Here, it was revealed that Blasty and Saur had gained the ability to Mega Evolve into Mega Blastoise and Mega Venusaur, respectively. Maxie and Archie countered by having their Camerupt and Sharpedo Mega Evolve as well. Eventually, Blasty and Saur succeed in defeating Camerupt and Sharpedo, but the battle was interrupted by the arrival of Groudon and Kyogre. Maxie and Archie used the orbs to turn Groudon and Kyogre into their Primal forms. With its new power, Groudon proceeded to easily defeat Green and Red by creating a sink hole to bury them under.
In Omega Alpha Adventure 21, Blasty assisted in stopping the Grand Meteor Delta.