Beef

Beef is a member of the Best Fitness Friends and a major antagonist in Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey. He is a muscular creature with pink skin, several layers of either muscle or fat, and red hair. He acts as the group's brawn (being the Melee typed fighter in battles).

He's first encountered with the other members of the Best Fitness Friends, and seemingly defeats Ludwig von Koopa alongside Iggy Koopa a bit later on.

However, it is revealed that the situation is not what it seems. Instead, it is revealed that Ludwig had defeated Beef in their encounter, and had been disguising himself as him the entire time. The real Beef was chucked into lava early on, and left in the store room back at Bowser's Castle afterwards.

After that though, he returns to the other Best Fitness Friends for their next encounter outside of Bowser's Castle (where he's battled) as well as with them in the final battle. Here he merges with Kaley and Dieter to form the final boss, before eventually being defeated for good.

Profile
Beef ''The brute force of the BFF. He's silent, but just one attack will leave you reeling.''