Answer: scoob

AnswerCrossword Clue
SCOOB

Scrappy-Doo's uncle, to Shaggy

SCOOB

Shaggy's dog, to Shaggy

SCOOB

Shaggy's pal, to Shaggy

SCOOB
Nickname of Shaggy's dog
SCOOB
Saturday morning cartoon dog, informally
SCOOBShaggy's nickname for his canine friend