Hard to explain, well mostly when I connect, i have a v3 and a v4 mostly the v3 for me is games, when I push the b button for my v4 I mostly get presents options. But the most common you will see is games.
it takes some practice... try different expririments! 8D
i know that pressing certian puttons when in standby mode cause them to do different things..what i cannot recall >.>
b on one tama to connect
b on one tama then b on the other tama right afterwards
b at the same time
i cannot rember what it makes thme do most of the time *but remember it`s only to improve your chance on doing different tihngs...it`s always going to be random through.
but remember even if their only playing and not visiting they`ll still develop a great freindship!