humble lagoon
A big fat wall of meat with a mouth that block the entrance to some rooms, i think it could also be placed to block the boombox area
IT would have a long tongue that would flop around eating any gorillas cuaght in it. Gorillas may work together feed it items (or eachother) till it busts and releasing all the items and gorillas.
Another way is when inside the beast players can work together to punch the monsters heart many, many times till it explodes that way too.
(Grenades will cause it to release a firey breath turning gorillas infront of it to a crisp)
lusty tulip