Raggat is a Pokémon based on the Black Rat, it has a general rat-like appearance with a small round body and short limbs with long feet. The Pokémon's body is covered predominantly in black fur although its underbelly is grey in colour, in addition the Pokémon has a rather unusual lime-green splotch-pattern around its neck and rear. Raggat's feet are long with very small claws, it has four claws on each limb which are partially transparent, its legs are white in colour with small bands of beige in-between.
The Pokémon's head is a bit shorter and more rounded than a rat's head, it has large circular ears with a small tuft of fur jutting out near the base in front of each one, the inside of its ears is white like its limbs and nose. It has a singular tuft of fur that juts out from the top of its head and curls slightly forwards, it has large black eyes which have a generally rounded-triangle shape to them. The most defining feature of the Pokémon is its tail which appears similar to a copper pipe, being dark turquoise in colour with the tail becoming wider at the tip where a hole is, the Pokémon is able to shoot sludge out of its tail as a defensive mechanism.