Previous versions of Anime Mugen might be smaller than the latest ones. However, be cautious with older versions as they might lack recent features and could potentially have security vulnerabilities.

Setting aside malware, is downloading an Anime Mugen APK "wrong"? From a legal standpoint in most jurisdictions, unequivocally yes. Mugen as an engine is freeware, but every character sprite, every voice clip (ripped from Naruto Shippuden: Ultimate Ninja Storm or Dragon Ball Z: Budokai Tenkaichi ), and every stage background is copyrighted intellectual property. Distributing an APK that packages these assets is copyright infringement on a massive, multi-studio scale.