Mad Green Koopa
From the Super Mario Wiki
Mad Green Koopas are enemies in Super Princess Peach. Mad Green Koopas are a variation of Koopa Troopas which are permanently angry. The game's Glossary describes that their personalities are similar to that of a spoiled child. Mad Green Koopas can also attack by simply charging towards Princess Peach.
Attacks angrily like a spoiled child!
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