Don first appeared as a Shieldon in A Big Stink Over Stunky. He was seen walking alongside his Trainer Byron. He reappeared in Brash Bronzong I, inside the Canalave Gym. During Byron's battle against Platinum, he attempted to flee but was caught up in Platinum's scarf, which revealed to Byron that Platinum had five Badges already.
In Hurrah for Rapidash, Byron offers to give Shieldon to Diamond after seeing how quickly he warmed up to him. Diamond decides to keep him and nickname him Don.
In Grumpy Gliscor, Don battled a wild Gliscor that was antagonizing Diamond. By rubbing his head off of Tru's tree he was able to increase his defense even farther than normal. Due to this Gliscor hurt its fangs when it bit down on Don, allowing Tru to finish it off.
In Lucky Lucario I, Riley trains Don, Lax, and Tru on Iron Island. The three start by battling against Riley's Lucario and are quickly defeated due to Lucario's speed. Despite the loss, Riley points out that the three have amazing defense and work wonderful together. After this Riley took the group into a cave and they are attacked by a wild Steelix. Don and Lax manage to hold it down long enough for Tru to attack with Crunch, making the Steelix flee. After the training Don learned to overcome his weakness in speed.
In Chancing Upon Chingling, after Diamond arrived on the Galactic Veilstone Building due to failing to stop Mesprit from being captured by Team Galactic, Don is used to help sneak around the base. Once Diamond was spotted by the Advanced level Grunt, Don participated with Diamond's other Pokémon to battle him but proved to be no match for his strength. Diamond attempts to escape but the Grunt catches up with him and has his Chingling, Staraptor, Gible, Cradily, and Haunter send a massive attack at him. As the attacks comes at him Don steps in the way and takes all five attacks head on. Just when he is about to give out he evolves into a Bastiodon and learns Metal Burst, sending all the damage he took back at his opponents. He then uses Iron Head to finish off the ones that remained standing.
In Double Trouble with Dialga and Palkia VI, Don was used alongside the other Pokémon to battle against the Legendary Pokémon Dialga and Palkia. Using his size, Don was able to do great damage to the Dragons with the help of Diamond and Pearl's Pokémon, and with a combined technique, they were all able to destroy the Red Chains controlling them.
In The Final Dimensional Duel IV, Don is seen visibly upset when Diamond is sent to the Distortion World. Despite this though he was not used when Pearl retaliated against Charon.
Personality and characteristics
As a Shieldon, Don was stubborn and picky, refusing to bond with Byron, no matter how hard he tried. Upon meeting Diamond, however, he quickly grew attached to him. Like his Trainer, Don is gluttonous, lazy, and relaxed. He is a strong battler and has strong defenses, as shown when he took five attacks at once.
| Using Iron Head
| A † shows that the move was used recently, unless all moves fit this case or there are fewer than five known moves.
In the anime
||From タテトプス Tatetops
||Same as English
||From 방패톱스 Bangpaetops
||阿龍 / 阿龙 Ā Lóng
||From 盾甲龍 / 盾甲龙 Dùnjiǎlóng
||阿龍 A Lùhng
||From 盾甲龍 Téuhngaaplùhng
|| Transliteration of his Japanese name