There is no breeding garden. Go to the black market in the chao kindergarten(the lockers) and if you went at the right time there will be heart fruits for 300 coins. Buy 2 and give one to the each of the chaos. They should grow a ring of flowers around them. If one doesn't, pet the chao and stuff an put it next to the other chao. Hope this helps
There is no breeding garden. Purchase 2 heart fruits from the black market and give one to one chao and one to another.
No
Mostly, but SA2B has upgraded features in the chao garden and a two player Battle mode, as the title implies.
Use action replay
There is no Sonic Adventure 4 Battle, there is Sonic Adventure 2 Battle but that was released 8 years ago.
you have to buy sonic adventure dx, sonic adventure 2 battle, or pantasy star online. sonic advenure dx and sonic 2 battle are for gamecube or you can play them on wii with a controller and a memory card and a gameboy cable.
action replay or a in the tiny garden in the gameboy
No, you cannot. You have to be in the garden with a character that your chao loves for it to recarnate
I am pretty sure you have to make a new game.
No as Sonic Advance 2 came out after Sonic Adventure 2 Battle and Sonic Adventure 2 Battle was only made to be compatible with Sonic Advance.
There is no such thing as Sonic Adventure Battle 1, nonetheless no Sonic Adventure is playable on Sonic Mega Collection.
Sonic adventure battle 2