Fake Yoshi

Fake Yoshis are Shy Guys duplicating into Yoshis and Baby Mario. You can control them but if you put them into a spike pit then it will turn into a Shy Guy.

File:15B35175-F778-4D31-8F9A-C75EF6B6BDF0.png

Yoshi and Baby Mario on the left and Pink Yoshi with Baby Mario on the right

This creates one of the most popular minigames known to fans in the Yoshi series. The concept of playing as multiple Yoshis, even temporarily, is very appealing.