Sometime prior to the start of the series, Excadrill helped Clay with digging out and expanding the mine he was working on. It would eventually become the current form of the Driftveil Gym. It first appeared in Battling the King of the Mines!, where it was Clay's final Pokémon in his Gymbattle against Ash. It first fought against Ash's Snivy and was able to easily block all of Snivy's attacks with Rapid Spin before knocking her out with Horn Drill. Excadrill next fought against Ash's Roggenrola. Roggenrola used Sandstorm creating a Sandstorm, but this did no visible damage to Excadrill being a part Ground-type and part Steel-type.
Excadrill then used Drill Run underground, hitting Roggenrola multiple times by going in and out of the ground. Excadrill then used its one-hit knockout move Horn Drill on Roggenrola, but Roggenrola endured it thanks to its Sturdy, but looked damaged. It then immediately evolved into a Boldore. Excadrill used Horn Drill again but was blocked by Sturdy once more, and then went for another Drill Run. Boldore caught this and used its red stones to communicate with Ash about its new move, Rock Blast. Using Rock Blast Boldore was able to deal damage to Excadrill and knock it back. It then communicated its other new move Rock Smash, which it immediately used. Excadrill used Rock Smash as well and whilst both were powerful, Boldore's Rock Smash overpowered Excadrill's, defeating the Subterrene Pokémon and winning Ash the Quake Badge.
Excadrill is a powerful and resourceful Pokémon, able to withstand many attacks due to its high defense and use of the move Rapid Spin. Like Clay, Excadrill is a hard worker and prefers taking challenges head on. It has an excellent relationship with its Trainer, having been with him since Clay was a young boy.
In Mine Mayhem, Excadrill was used in Black's Gym battle against Clay, battling against Black's Costa. Excadrill attempted to hit Costa with a super effective Drill Run, but the attack did little damage. It was later sent out to battle Black's Nite. Having permission to wreck havoc on the Gym Excadrill used a strategy where it dug into the ground in order to hide where it was before popping back up and attacking. Deciding it was okay to do the same Black had Nite attack every hole that was made in order to find where Excadrill was. Nite soon found Excadrill and crashed into it, causing a rock to break the generator giving the mine light. Upon checking what happened it was shown that Excadrill and Nite were both defeated.