About 16, if you found the hidden cave in the mansion (that leads to Birth Island) about 44.
Btw, on Birth Island you can get Lugia and Ho-Oh
The Pokemon Mansion in Sinnoh is located on Route 212. Owned by Mr. Backlot, the mansion is also home to the Trophy Garden were the player can find many Pokemon unique to that location.
The Pokémon Mansion in the Pokémon games contains many rare Pokémon. There is no 4th floor to be found in the mansion.
There is only one eevee in Pokemon leaf green but you can breed them at the daycare or trade from another game.
There are 7 catchable rare Pokemon in leafgreen however here's the catch, there are 7 but you can only catch one of 3 legendary dogs Raikou/Suicune/Entei it depends on what starter Pokemon you chose. Also there are 3 event only Pokemon you can get making the total to actually 10 in all.
The Trophy Garden in Pokemon Diamond is located behind the Pokemon Mansion on Route 212. Many rare Pokemon may be encountered and caught only in the Trophy Garden.
You have to go to the Pokemon mansion, This mansion is located in thee same town as the 7th gym leader. In the Pokemon mansion there will be many ways to walkthrough. (Hint, The mewtwo statues have switches.)
you must go into the old mansion on the island and search for the key. the mansion is inhabbated by a couple Pokemon such as vulpix to muk it also has many items and trickey door locks
there are 151 between leafgreen and fire red
150
There are 2
Only 1.
You can use Pal Park to transfer Pokemon from the third generation (Ruby/Sapphire/Emerald/FireRed/LeafGreen) to the fourth generation (Diamond/Pearl/Platinum). Ditto can be found (in many places, rarity Uncommon) in FireRed and LeafGreen.
In total including event only Pokemon there are 10.
Only one
The Pokemon Mansion in Sinnoh is located on Route 212. Owned by Mr. Backlot, the mansion is also home to the Trophy Garden were the player can find many Pokemon unique to that location.
Of the many Pokemon that you can't get in leafgreen are: Ekans, Poliwag, Scyther, Delibird, Oddish, Murkrow, Growlithe and many more. Edit: Poliwag can be found using a super rod in the pond at route 6.
7, i believe.