Bandai released a searchable Gunpla manual database with high quality scans.

https://sh.itjust.works/post/367262

Bandai released a searchable Gunpla manual database with high quality scans. - sh.itjust.works

No EN mode as far as I can tell, and typing the English name doesn’t always bring results. Searching by grade and year range helps narrow things down as I stumble through JP.

Oh nice! This is awesome! For some reason the website is super slow for me… also if people haven’t heard of it yet, dalong.net is also a good source for manuals/kit reviews!