Pokémon Cryptic Crystal:

>Chibi game Developed by GameFreak

>Every Unown letter placed throughout Johto (unsure if kanto)

Each unown teleports your character to a dungeon challenge

Dungeon challenges have trainer battles and cave puzzles (gsc style)

Completing all of them seems to unlock something

>4 additional kimono girls at Ecruteak city, one of them is a child

-Mini game Dance sequence with the kimono girls

>Increased Wild encounter rates during night time

Wild pokemon have red eyes and are stronger

Don't have red eyes when captured