The following are known Action Replay Codes for Donkey Kong Country 2 on Nintendo Game Boy Advance (GBA).

These are Action Replay Version 3 (V3) Codes.

The codes should work with the region specified but may work for other regions as well.

(M)
77bd1554
c2958e49
cb79d90d
cbe268bb

Infinite Lives
a9bf8640
f6271448

Always Have 99 Bananas
bae922d5
20314f74

Always Have 99 Banana Bunch Coins
6cd040e0
aedbca41