This is the theme of multicart contains 25 games. The menu is almost identical in design to the 1000 in 1, except with different colours and an intro screen. Like the 260 in 1, all of the data is stored as PRG in a similar way to OneBus multicarts.

700 in 1 NES Menu Theme [Remake]

Mega Man 3 - Proto Man Theme

Mega Man 5 - Dark/Proto Man's Castle | 8+16-Bit Remix (Yes, you read that right.)

Unrest Mind

I would rather go to sleep then think of you

Humility

Valiant

Bliss Remedies

Skewered Hope

Black Mimosa

My second entry for Famicompo Pico 3, which made it to 4th place! Holy shit! Thanks so much to everyone who voted!

FCP3: Mega Man 3 - Proto Man's Theme [MMC5 + VRC6]

Unrest Mind

Deepsea Lullabier