Mettaton

Mettaton is common rarity. Mettaton is OP if you know how to use it right. Starts off terrible, but skills get better each level up.

Level 1: Energy Bullets
Shoots 3 pink energy bullets.

Level 5: Jetpack Thrust
This skill will allow you to be driven by a jetpack.

Level 10: Hyper Kick
Kicks the nearest enemy.

Level 15: Incinerating Burst
Shoots a beam.

Level 20: Overdrive
A toggle skill that also gives user a speed boost.

Level 1 Overdrive: Energy Bomb
Shoots a big pink energy bomb that explodes with contact.

Level 15 Overdrive: Full Power Burst
Shoots a big beam.