Here is the list of the information sources i use, you can submit or point the mistake using my email

AniDB.net - anime database where i take descriptions from, it's trusted by many anime sources (such as MyAnimeList, AniList, Anichart, etc.). It may be good for a mainstream and more popular series, but i'm not sure about Mecha genre, so please point out everything that's wrong!

Danbooru - when it comes to art, there is no such a dedicated all-in-one place for official anime arts (that are at least work right or have what i need), but i recall myself going to danbooru many times, with just writing the artist's/designer's name. It's not really much, but hey, it's at least something

Akurasu Wiki - the biggest Super Robot Wars/Taisen wiki on English (not only SRW, but still), the episodes name's and mecha debutes comes from this site and it was my biggest inspiration to make MG. This site include's most of the games's scenario list, series list of each game, many fun-facts to read, etc.