Tepig first appeared alongside the other Unova Starter Pokémon in The First Chapter! He was chosen by Bianca to be her Starter Pokémon and later had a battle against Professor Juniper and her Minccino. The battle was quickly called off when Tepig refused to listen to Bianca's commands.
In the following episode, Tepig was used to battle a wild Patrat that Bianca wished to catch. Due to Bianca's inexperience with battling, she had trouble maintaining control of the battle, causing Tepig to be defeated. Upset with Bianca for causing him to lose, Tepig ran off. Bianca followed him and apologised for not commanding him properly, causing Tepig to forgive her. Together the two began training, deepening their new bond. Tepig then had a rematch against the Patrat and this time weakened the Scout Pokémon enough for Bianca to throw a Poké Ball. However, Patrat broke free and escaped. Despite this, Tepig happily hugged his Trainer, excited at having won his first battle.
Tepig was used in the fight against Team Plasma in Crisis in the Cold! He battled against a grunt's Woobat and won.
In Pokémon - The Musical!, Tepig, alongside the rest of the group's Pokémon, participated in a Pokémon Musical.
Tepig is shown to be a very happy-go-lucky Pokémon, much like his Trainer, and almost always has a smile on his face. Despite this, Tepig is shown to take time to trust new people, as shown with his initial rejection of Bianca as his Trainer. However, once a person does gain his trust, Tepig is an extremely loyal Pokémon.