Little Yoshi

From the Super Mario Wiki

Little Yoshi shown here sitting at the bottom-right of the screen.

The little Yoshi eating a panel from Tetris Attack.

Little Yoshi is a young Yellow Yoshi, closely resembling a Baby Yoshi, whose only appearance is in the game Tetris Attack. He appeared to be Yoshi's friend; perhaps even his child. Also note that his shoe is the same color as Yoshi's.

Baby Yoshis in the game Yoshi were also referred to as Little Yoshis. However, these were a group of Yoshis rather than a single character. It is plausible that Little Yoshi is indeed a Super Mario World Baby Yoshi, judging by his perpetually half-open eyes, more beak-like nose, lack of a saddle, and his stout appearance.