Implicating black_yoshi → yoshi
Link to implication

Reason:

Also:
blue_yoshi → yoshi
brown_yoshi → yoshi
cyan_yoshi → yoshi
green_yoshi → yoshi
orange_yoshi → yoshi
pink_yoshi → yoshi
purple_yoshi → yoshi
red_yoshi → yoshi
white_yoshi → yoshi
yarn_yoshi → yoshi
yellow_yoshi → yoshi

beta_yoshi → yoshi
piranha_yoshi → yoshi
ship_yoshi → yoshi
winged_yoshi → yoshi

These are all Yoshis. Red Yoshi is a Yoshi, Winged Yoshi is a Yoshi and so on.

Aliases:

light_blue_yoshi → cyan_yoshi
They are the same. Even the yoshi wiki page shows this (links "cyan/light blue yoshi" to "cyan_yoshi").
light_blue_yoshi has only 3 posts whereas cyan_yoshi has 207.

blimp_yoshi → yoshi
Because blimp_yoshi is basically yoshi + inflation