No, this isn't a good idea. The betta might nibble the axolotl's delicate gills, and a big axolotl could swallow a betta, but the most obvious reason why the two are incompatible is that they prefer very different water temperatures. Bettas are tropical fish that require relatively high temperatures of 25-30 degrees Celsius, whereas axolotls prefer their water cooler, around 15 degrees.
No. Betta fish will attack each other no matter the sex.
keeping multiple bettas in the same tank is not reccomended
Male Betta splendens fight with other male Betta splendens so the answer is most other fish will not fight with a Betta in the same tank. To try to list every species of fish here would be impossible.
No...betta fish are usually aggressive and might kill the angelfish.
No they cannot, also if you put two Betta fish together, they will fight.
anyother fish, they only fight with each other
No, because they are fighting fish and one of them will kill the other.
no they will kill each other bettas are vicous
Most fish get along well. However, do NOT mix betta fish with other fish. Not even another betta. You have to have a permit to have to betta fish in the same tank with eachother. Betta fish are only mixed to mate. Bettas are not born in the egg. They come out as a very small fish. After the betta babies have come out, all of the fish are seperated. Even the parents, if the betta babies are left in the tank with the others the betta parents are very likely to eat the others.
Female Betta fish can be fairly good community style fish and should be fine. Male Bettas would massacre the community.
You should not put your Betta fish in the same tank in the first place, most likely the male will kill your other fish. by res do you mean red eared slider?
You don't have to, but the Betta Fish likes it because they can sleep in the plant.