He first met Ash when Snorunt was practicing its Ice Beam. He had threw himself in front of his Swalot and had his rear-end filled with ice. He was revived and asked if Ash was in the Grand Festival. He had his Pokémon Contestribbons stolen by Team Rocket and they nearly got away with it. Ash and May helped him get his ribbons back. He lost to May when the time ran out. He had gotten 52nd place in the preliminary rounds.
Anthony's Swalot was Anthony's main Pokémon — possibly his starter Pokémon. It successfully got Anthony through the appeal round of the Hoenn Grand Festival and was used in Anthony's battle with May. May managed to defeat Anthony.
Anthony's Pinsir battled against May during the Hoenn Grand Festival. None of Pinser's moves were actually mentioned but it appeared to use ViceGrip to stop Combusken's Peck attack. Anthony's words when Pinsir did this were "grab hold of Combusken" so it is debateable about whether Pinsir was actually using Vicegrip.