Goombule

Saibō are a type of cell-based Goombas found in various insides of Bowser in Mario & Luigi RPG 3. Saibō have an eggyolk shaped body with an orange core in the center. They attack by ramming a bro. When Mario and Luigi practice one of their Attack Parts moves, the targets will be Saibō.

サイボー　Saibō is derived from 細胞 Saibō, meaning cell, and is a pun on クリボー Kuribō, meaning goomba.