TYPE: Electric, Turtle.
AFFILIATIONS: Koopa Troop.
CLOSE RELATIVES: Electro-Koopa.
SKILLS AND ATTACKS: None.
STRENGTHS: Can't use normal attacks on it.
WEAKNESSES: It can be flipped.
BACKGROUND: Thunderkoopas are huge Electrokoopas that are quite lazy. Their name sounds fierce, but they can use their electricity to make things hyper. This is very powerful when they're sleeping.