How about these ideas?
Ice Age
Era Types: Ice, Water, Rock and Ground
Mandatory:
Generation I: Dewgong
Generation II: Piloswine
Generation III: Walrein
Generation IV: Froslass/Mamoswine
Generation V: Cryogonal
Banned: Electric types, Grass types, Bug Types
Era Rules: You may not use the Poke Mart because there are no markets. You must rely on what you are given
Johto games Rules: Once you are able to reach the Kanto region, Normal Types can join your team
Feudal Japan Era
Era Types: Poison, Dark, Bug, Fighting
Mandatory:
Generation I: Hitmonlee or Hitmonchan
Generation II: Ariados/Crobat
Generation III: Hariyama
Generation IV: Gallade/Toxicroak
Generation V: Bisharp
Banned: Grass Types, Electric Types, Water Types
Era Rules: As your Pokemon represent the army of Feudal Japan, you may only shop from each Poke Mart once, representing your army not stopping in the village.
Johto games Rules: Once you are able to reach the Kanto region, Steel Types are allowed to join your team.
The Roaring Twenties
Era Types: Normal Types, Psychic, Dragon, Ice
Mandatory:
Generation I: Persian
Generation II: Granbull/Blissey
Generation III: Delcatty/Slaking
Generation IV: Purugly/Lopunny
Generation V: Cinccino
Banned: Dark Type, Bug Type, Fighting Type
Era Rules: You must buy something from every Poke Mart and may not sell any items.
Johto games Rules: Once you are able to reach the Kanto region, Steel Types and Electric Types are allowed to join your team.
Any of those any good? I got really bored at work today.
i think i get it so i cannot have a lunatone in stone age(rock types are allowed,psychic types are banned) but i can have a ludicolo (grass is allowed, water is not mentioned)
I started playing stone age earlier, and am posting my sign up now. Anyhow, that's how I read it too, and I use a Ludicolo too! :D
OT:
Username: Happy Smiley Yum Yum
Game: Sapphire
Era: ALL OF THEM! (In historical order ofc.)