Check out the Sonic Team website. It appears that Amy is an unlockable secret character in Sonic Advance 2.
Source: *Sonic Team Japanese Website*
Wed Jul 23, 2025 | 2 d
Wed Jul 23, 2025 | 2 d
Delayed | TBA
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Wed Mar 4, 2026 | Tentative
Fri Mar 19, 2027 | 607 d
Check out the Sonic Team website. It appears that Amy is an unlockable secret character in Sonic Advance 2.
Source: *Sonic Team Japanese Website*