DoReMi Fantasy: Milon no DokiDoki Daibouken (ドレミファンタジー ミロンのドキドキ大冒険, "DoReMi Fantasy: Milon's Heart-Pounding Great Adventure") is a 1996 game released only in Japan for the Super Famicom by Hudson Soft. The game is a sequel to the 1988 NES game Milon's Secret Castle.

It was re-released for the Wii's Virtual Console at a cost of 900 Wii Points, available in North America on March 10, 2008 under the "Import" category, and in Europe as part of the 3rd Hanabi Festival on September 5, 2008. This version is virtually identical to the original version and was not translated.

DoReMi Fantasy is somewhat different from the original Milon's Secret Castle. This game is more of a straight platformer, while its predecessor combined platforming with puzzles and exploration. The game also has a more lighthearted and whimsical tone than the original.

• The game no longer takes place at a dark castle with several rooms, but in several thematic areas spread in 7 worlds, which are displayed in a world map. Each world is divided by a few levels that must be cleared one after another, with a boss at the end.

• Milon's basic attack still consists of bubbles, although they are now used to trap enemies in them first and pop them, before the enemies escape. There are other, more powerful attack techniques such as a charged bubble.

• Powerups allow Milon to accomplish special moves, such as the bubblegum, allowing Milon to momentarily float when he falls in the hole.

• Milon can jump on enemies, but they will only be stunned.

• Milon's health level is reflected by the clothes he is wearing. If he hasn't been touched, his clothes are colored green. When he is hit, his clothes will changed to blue, and later, red. If he is touched while wearing red, the player loses a life. Unlike the first game, dying once does not mean game over.