No need.

Do you need an Analogue Pocket if you just want to play Game Boy/Game Boy Color/Game Boy Advance games? No. Get a GBA SP, and it's fine if it's not an AGS-101.

Do you need an Analogue Pocket if you just want to play Game Gear games? Kinda; it really is the best way to go, but for $250 + shipping (and duty if you're not in the US) you'd better really like your Game Gear games.

Do you need an Analogue Pocket if you just want a region-free TurboExpress with a proper display + SuperGrafx compatibility, a Game Gear that isn't completely washed-out, a Lynx that actually fits in your hands, and a back-lit NGPC? 100% yes, and it's absolutely worth the $350 + shipping (and duty if you're not in the US) if you can afford it. Throw-in the GB/GBC/GBA compatibility, save states, custom palettes, display options, screenshots, Nanoloop, GB Studio, and the developer tools... Plus MIDI, analog sync, and link cables... And a dock plus wireless controller support... Yeah, the Pocket's kinda nuts.

I got a yellow one.