Dark Fawful Guy
From the Super Mario Wiki
Dark Fawful Guys are a variant of Shy Guy that appear in Mario & Luigi: Bowser's Inside Story and its remake, Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey. Dark Fawful Guys are a stronger variant of Fawful Guy, with higher stats in every attribute except HP (being the only 'dark' variant with this distinction).
They appear as dark purple with blue Fawful masks, and are always seen carrying Dark Fawful Bombs. Both only show up during battles in the taken-over Peach's Castle if at least one Naplock or Dark Trashure was present at the beginning; they also appear alongside Dark Mechawfuls in Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey, but only if Dark Trashures are present as well.
Bowser cannot fight them directly, and must inhale them in order for Mario and Luigi to battle them inside his body; if left alone for enough turns, the Dark Fawful Guys drop their Dark Fawful Bomb on Bowser, which deals a great amount of damage. If Bowser inhales the Dark Fawful Guys, the bomb falls on the other enemies present and damages them.
Dark Fawful Guys have the same attacks as their normal counterparts, though they are performed quicker and deal more damage. For one attack, the Dark Fawful Guy is snagged by a Yoshi-like tongue from offscreen and turned into a Yoshi egg (preceded by a Yoob-like roar in the original). A Yoshi's Island-style targeting cursor then appears, aiming towards one of the Bros. before the egg is flung at them. The attack is dodged or countered by jumping, and stomping on the egg breaks it open and damages the Dark Fawful Guy. Dark Fawful Guys also perform Woozy Guy-style somersaults towards the Bros., who must counter with the hammer to avoid damage; occasionally, they release a Glide Guy-like umbrella from their head before jumping, which slightly delays their jumps and can throw off the hammer's timing.
Mario & Luigi: Bowser's Inside Story / Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey
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