Candy Cotton Monster

Amorphous. The ooze can move through a space as narrow as 1 inch wide without squeezing.

False Appearance. While the ooze remains motionless, it is indistinguishable from a 70's disco wall.

Damage resistance.  It if hit by a bludgeoning, slashing or piercing attack it receives only half damage. If hit by an attack that deals fire damage it receives only a third of the damage and it gets an additional +5 bonus on it's AC (bonuses can stack).

Weakness. If attacked by a biting/chewing (works if a humanoid does it too) or water based attack it receives an additional 1d6 damage.

Pseudopod. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) bludgeoning damage plus 4 (2d4) sugar damage. If someone receives 2 sugar damages in a row they have to make a constitution saving throw DC 12. On a fail they have a sugar rush for one round and all their attack rolls and saves are made with a disadvantage, they also have to make a spell concentration check (if they have cast a concentration spell) because of the hyperactive shaking and lack of concentration.