Treble

Treble, known as Gospel (ゴスペル) in Japan, is Bass' robot wolf. He is very similar to Rush. Bass can fuse with him to gain wings and fly using the Treble Boost, that was created based on the Super Adapter.

Mega Man and Bass CD data
A wolf-type robot created to support Bass. It can transform into an adapter and join with Bass. "Grrrrrrrrrr!" Good point: Brute instinct Bad point: Habit of biting Like: Girls Dislike: Rush, Tango

Trivia

 * In Japan, Treble's name is Gospel, which was left untranslated in the MegaMan Battle Network series.
 * Treble is one of the many characters who have music-inspired names.
 * Despite the fact that Bass made a small cameo in Mega Man 9, Treble was nowhere to be found.
 * In Megaman Battle Network 6, A cybeast name Gregar appeared in the game as part of the main plot. Gregar's design is closely similar to Treble but with different color scheme.