Character Coin

From the Super Mario Wiki

Character Coins or Baby Coins are coins that the Yoshis can collect in Yoshi's Island DS. The Yoshi can only collect a Baby Coin with the baby on Yoshi's back that is seen on the coin. Having all eight Baby Coins in a world with the exception of world five which has seven, a mini-game in the game's hard mode is unlocked.

Coins Mario series Ace Coin • Advance Coin • Beanbean Coin • Blue Coin • Dragon Coin • e-Coin • Evil Coin • Frog Coin • Golden Coin • Large Coin • Mario Coin • Pianta Token • Purple Coin • Question Coin • Red Coin • Silver Coin • Slot Coin • Star Coin Yoshi series Character Coin • Coin • Heart Coin • Red Coin Wario series 100 Gold Coin • Gold Coin DK series Coin • Banana Coin • Bear Coin • Bonus Coin • DK Coin • Kremkoin • Nintendo Coin • Taj Token SSB series Smash Coin