Akai

Release: 2005
Language: Japanese
Battery: cr2032
# of characters: 20 + 3 special
# of games: 3 + 4 playable connecting
Connects with: JPN akai, keitai, plus, entama, uratama, hanerutchi 1, dekatama, home deka, mobile phone (defunct, passwords still work)
ENG v2-v4.5
Extra: Has red pixels instead of black. They're notoriously hard to see.