AK2i is latest version of AK (AK2.1 is older, has many plastic "bugs" which are fixed in AK2i version)
Yep, the next thing is DSi support.
AK2i is better, and is almost in the same price...
Pokemon work on both - all game work on both - but you have to ask in different way...
ON WHICH SYSTEM DOES POKEMON WORK?
(the akaio system is the best for both cards... )