Source code is attached in the Minesweeper thread: https://gbatemp.net/attachments/minesweeper_2ds_11_src-rar.18105/ Is it this Minesweeper source code you were asking for? Or is there a different minesweeper? Most of the time when a homebrew is released, it's released with it's source too.
Quote from https://www.hex-rays.com/products/ida/ IDA is a Windows, Linux or Mac OS X hosted multi-processor disassembler and debugger [..] So it isn't only debugger, it's also a disassembler.
