Magikarp

Bob's first Pokemon. Even though he's his oldest Pokemon, he isn't used too much.

History
Obtained during Pilot, he apparently leveled from 2 to 5 after defeating a level 20 Arceus owned by his rival, Yarg.

In Spirit, he beat the ghost of a Marowak

In Rivalry. he temporatily evolved into Gyarados, and defeated Yarg's Arceus.