Here’s a detailed list of what the pacific game file works on. All .gb files are the default game.

.gb Using flash carts

Gameboy, Pocket, Light, Colour (Color), Advance, Sp, Gameboy clones.

.gb On emulators and devices

Pc, Laptops, Macs, Smartphones, tablets, Emulation consoles, Steamdeck, Etc.

And of course 

.pocket

Analogue Pocket.

Look up a Gameboy emulator on your preferred device.

Have fun! :)