This Aggron is a steel/rock-type Pokémon owned by Johnny.
Johnny used his Aggron in the Ever Grande Conference against Tyson and his Sceptile. Aggron used Metal Claw but Sceptile was able to dodge the attack by using Detect and Aggron kept using Metal Claw while Sceptile kept evading Aggron's attacks with Detect. Sceptile used Bullet Seed and Aggron used Metal Claw again but Septile used Detect again to dodge the attack. Aggron became tired after using Metal Claw many times and used Harden to raise its defense. Sceptile then charged its Solar Beam and thinking there was still time, Aggron charged towards Sceptile with Metal Claw but Sceptile fired its Solar Beam just in time, defeating Aggron.