Nikoli no Sudoku 3D - 8-tsu no Puzzle de 1000-mon / release rja55b2p / correction
Suggest a correction ニコリの数独3D ~8つのパズルで1000問~, Nintendo 3DS, JP
Corrections are GitHub issues on the public data repository, so each one is in the open with its evidence. This page fills the issue in; on GitHub you say what kind of evidence it is and submit (a GitHub account is needed). How corrections are checked.