>>412029041 It's a name, not an adjective, if the mon is called "Mugendaina" in japanese then that's how you should call it in english (that's the established rule with legendaries)
2 See
>>41200621 It's a world play with 大, 巨大 and 無限大 so english should base the names on the words "big"/"huge", "massive"/"giant" and "infinite"/"limitless". The only good name here is Gigantamax's "giganta" as adaptation of 巨大, the rest are shit, "Dyanamax" is shit, "Eternamax" is shit and therefore "Eternatus" is shit. If they really wanted to change the name of the third legendary they should have used "Infinitus" or "Unlimitedus" or something like that, "eternal" doesn't convey size at all
