Put your differences aside

[Willthomjr]

Would {Amobeia Changling} also work with {Kiki-Jiki, the Mirror Breaker} or does it only change the goblin part?

Not sure what you mean, but Legendary isn't a creature type.

Then the mikaeus's kill each other by the legend rule?

No, the legend rule means both creature have to have the exact same name. It's different than the Planeswalker rule.

So you can have {kamahl, fist of krosa} and {kamahl, pit fighter} out at the same time?

[scarsabrex]

yes

[scarsabrex]

but having two {sakashima the imposter} copying different stuff will legend rule them.