Eeker

Eekers are enemies found at Woohoo Hooniversity in Mario & Luigi: Superstar Saga. Their name is a portmanteau of "eek" and "beaker". They do not show up on the field, but they fight alongside Viruses. The Eeker has two attacks, each with a different counter: its first attack involves crossing its arms and then tilting an equal number of times before charging at Mario or Luigi, which is countered by jumping on it, and its second attack has it charge up with fire and spew out fireballs, which must be countered with the hammer before it releases them. If an Eeker is attacked on offense, but not defeated by Mario or Luigi on his first attempt, the Eeker will immediately charge up with fire so that the next time it performs the latter attack, it cannot be countered before releasing fireballs at one of the brothers.