non-anime cartoon characters appearing in anime video

[xxxxx]

quisp was an alien spaceman with a propeller on his head which enabled him to fly. quisp was the cartoon character for quisp cereal. then there is the trix rabbit which is the character for trix cereal. would either or both of these characters appearing in a video with rabi-en-rose from di gi charet be a) funny b) stupid c) beyond our current technical ability d) within our ability but this is not the sort of thing we do here.

[godix]

quisp was an alien spaceman with a propeller on his head which enabled him to fly. quisp was the cartoon character for quisp cereal. then there is the trix rabbit which is the character for trix cereal. would either or both of these characters appearing in a video with rabi-en-rose from di gi charet be a) funny b) stupid c) beyond our current technical ability d) within our ability but this is not the sort of thing we do here.

A) Depends on how you do it.
B) See A
C) It'd require a lot of time if you actually plan on pulling the characters out of the background but it is possible. So no, it's not beyond OUR technical ability but since I don't know your abilities I can't guarentee it isn't beyond YOUR technical ability.
D) See A. If the video is mostly anime with a couple seconds of non-anime characters then I doubt it'd be a problem but if 75% of the video is non-anime then it probably belongs elsewhere.

[Kaji01]

It's not like it hasn't happened before, really. Dokidoki used a shot of the wolf from one of the Warner cartoons in his "Right Now" video (I forget if he has a name or not, but it's the short where a country wolf goes to the city and trades places with his brother), and Tom the Fish used a shot of the Peanuts gang dancing for about 3 seconds during his "It's the End of the World as We Know It" video. If you're using the non-Japanese stuff (technically it's still anime by the Japanese definition of the word due to the fact that it's all-encompassing) to accent it, I really don't see a problem with it. In your case you're thinking about having the character(s) costar with Rabi, which looks like it shouldn't be too much of a problem I would imagine...