you go to solaceon town and go into the solacion ruins
You can find them in solaceon ruins
you have to catch all of the other unknown forms from a-y then the letter z comes in the last room.
After entering the Hall of Fame at least once go to Pokemon Village from Snowbelle City. At the village look for some water to Surf on and use Surf. Go north and you will find a cave, this is Unknown Dungeon. Inside the cave you will find a lone Mewtwo waiting for you.
Accasionly when you do normal things on tppc you can find unknown Pokemon. No i don't mean the Pokemon unknown like unknown a, b, c, ect i mean a Pokemon that is not identifyed. Kyogre is one of them. You can find them just like you find Chimchar, Piplup, and a few others. It will say at the very bottom of the screen An unknown Pokemon was spotted or somehting like that. WARNING: Mystery Pokemon are a very high level and are hard to beat. You can tell what the mystery Pokemon is by its shape. So far i have only found Kyogre. GOOD LUCK!!! P.S. On tppc my name is LoverAngel, add me as your friend!!! You can only get Kyogre from Team Aqua's team quests , not through the mystery pokemon. Mystery pokemon do One hit KO moves on you and kill you ALL THE TIME. The only way to get a Kyorgre is by doing Team Aqua quests. In the past DarkKyogre was obtainable from a promo . PEACE OUT -Trainer #2094237.
7island
it is unknown
Unknown(sorry about my spelling) Letter A is the rarest Unknown in all games. You are more likely to find a shiny Pokemon then Unknown A but if you are dedicated then go for it but prepare for frustration.
You can find them in solaceon ruins
solacoen ruins
#114 is unknown. its found in the soleancean ruins
you carnt without cheating our hacking/codes
Solceon ruins.
you get a diploma
you can find the ? and ! unknown'
You can't the unknown Pokemon are from the gold, silver and crystal games they are not in sapphire, ruby or emerald. :)
You may need to find a trainer who has an Unown (sometimes wrongly spelled as Unknown) to complete your Pokedex. You can find someone who has it in the Solaceon Ruins.
Once you move the rocks in the cavern you can find unknown in the Tanoby Ruins.