Tut 'n' K'mon

is a Rank S Wind-attribute Yo-kai of the Shady tribe.

The Yo-kai Medallium bio reads; "The king of the world of impatience. He can't even wait for a single instant, so the management staff in his palace works hard to reduce all waiting times to zero."

Matenou evolves from K'mon-K'mon when fused with a Letter of Postponed Release.

Yo-kai Watch 3
Fuse K'mon-K'mon with a Letter of Postponed Release.

Trivia

 * Matenou's face markings could be a reference to the Devilman series.