Chum

Crawling. Chum can crawl on walls and ceilings

Size Alteration. Chum can have its size altered as a bonus action by the summoner. The range is between 7 feet and 15 feet.

Big Fella. Chum has disadvantage of stealth checks but advantage on intimidation checks.

Body Removal. Chum can chow down on the corpses of beast creatures, healing 2d8 hp per body(medium or higher) while small and tiny bodies will only regain 2d4 hp.

Stubborn. Chum requires DC 12 animal handling checks for certain actions (chosen by the dm).

Preferred Climate. Chum functions better in dry climates. Whenever in dry areas, Chum makes all rolls at advantage.

Favorite Food. When hitting any creature made of wood, Chums damage will always be a crit.

Firefly. As a free action, Chum can light up his rear end.

Ladybug. Chum's shell is now red with black spots, making enemies less likely to attack him in fear of poison. Creature's with high enough intelligence are able to see past it though, and creatures with low enough wisdom don't care.

Rhino Grip. 10 ft reach, DC 19 dex or str save, on a failed the creature becomes grappled. The creature will take 4d6+6 bludgeoning for each of their turns that they're grappled.

Body Removal. Chum can chow down on the corpses of beast creatures, healing 3d8 hp per body(medium or higher) while small and tiny bodies will only regain 3d4 hp.

Stone Eater. Chum can now eat rocks, resulting in 2d8 healing. This can be done four times per day.