Actually, you might want to open it up and see. I don't have that game, but I opened up a few carts and they all had flash memory, not batteries.
Yep, the only games with save batteries versus flash saving are
Baseball Advance
- Boktai 1, 2 and 3 (JP)
- Bomberman Tournament
- Breath of Fire
- Breath of Fire II
- Castlevania: Circle of the Moon
- Castlevania: Harmony of Dissonance
- Dragonball Z Collectible Card Game
- Hamtaro: Ham-Ham Heartbreak
- Kirby: Nightmare in Dream Land
- Krazy Racers
- Lego Bionicle
- Lego Island 2: The Brickster's Revenge
- MegaMan Battle Network
- MegaMan Zero
- Metroid Fusion (Only some use a battery)
- Metroid Zero Mission
- Monster Rancher Advance
- Monster Rancher Advance 2
- Pokemon Emerald (Not for saving, but for other game events)
- Pokemon Ruby (Not for saving, but for other game events)
- Pokemon Sapphire (Not for saving, but for other game events)
- Super Dodgeball Advance
- Warioland 4