This Seismitoad belongs to Sean's father, but was borrowed by his son and used by Glenn.
Sean borrowed this from his father. Glenn forcefully took both him and Scolipede, and aggresivley made Sean back off. Since Glenn had a barbaric, pointless strategy during his battle with Mick, Sean uses Seismitoad to block Thunderbolt. Glenn is annoyed at his intelligence, which ultimately led to Scolipede being defeated by Pikachu's Electro Ball. While Sean tells Glenn that Seismitoad should attack Pikachu, he ignores him which leads to Seismitoad's Drain Punch and Krokorok's Crunch colliding. Despite Fighting's advantage over Dark, Seismitoad is pushed back and loses.