Pokemon 4-in-1 is a multicart bootleg created by Union Bond.
Like the name suggest, Pokemon 4-in-1 has four different games: Picaclick, Pacman, Picaslot, and Picadance.
Picaclick- A puzzle game, similar to SameGame, where you click on a group on the same items to remove it.
Pacman- It's Pacman with Pikachu.
Picaslot- It's a slot machine with Pokemon.
Picadance- A Dance Dance Revolution (DDR) clone played with a D-pad. It contains the songs Butterfly, Babylon, and Sunrise.
4-in-1 contains Pokemon from gens 1 and 2, but the main focus is on Pikachu.