Tyson first appeared in Like a Meowth to a Flame!. He rescued Ash and his friends from a flock of Murkrow with his Meowth. They quickly became friends as it turns out they were going to the same place to eat and because Tyson has a certain fondness for food like May. The group met up with him interacting with Charles Goodshow, where he found out that Ash and Brock were also torch-runners in the past. Later, an "Officer Jenny" and "Nurse Joy" (Team Rocket in disguise) went up to Tyson and ran off with the torch of Moltres. He warned Ash and the gang that they ran off with the torch and chased after them. Tyson stopped their balloon by having his Metagross use Confusion. His Meowth successfully took the torch from the talking one and finished the villains with Thunderbolt.
In Saved by the Beldum, he came to Ash's and Morrison's rescue from Team Rocket's pit traps. Once again, his Meowth sent them away but this time, with an Iron Tail. He later battled Vivica and her Persian in the first round of the Ever Grande Conference. Tyson used Meowth and ended up winning the round, only for him to restrain Meowth from attacking any further.
In Shocks and Bonds, Tyson went up against Johnny with Sceptile and Aggron remaining as Donphan and Blastoise were already knocked out by the time Ash and company arrived to watch his battle. Tyson was able to defeat Johnny when Sceptile successfully used Solar Beam on Aggron.
He then watched the Full Battle between Ash and Katie.
Tyson defeated his opponent's Rhydon with Meowth in A Judgment Brawl after Ash defeated Katie.
He battled Ash in Choose It or Lose It! and At the End of the Fray!. Tyson was a very tough foe for Ash as both sides were down to their last Pokémon, Pikachu and Meowth respectively. After a long battle, both sides were having trouble standing up. However, Meowth emerged victorious when it was the only one standing. Tyson congratulated Ash for a good battle. Tyson then went on to the finals and ended up winning the Hoenn League Conference, having the chance to battle the Hoenn Elite Four.
After the Ever Grande Conference, he said goodbye to Ash and his friends as he left Ever Grande City.
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This is a listing of Tyson's known Pokémon:
Tyson with the Ever Grande Championship Trophy
Tyson has competed in the following Pokémon League Conferences:
||Similar to his Japanese name.
||철 (鉄) means iron, as Japanese tetsu.
||From the name 哲也 Tetsuya.