Any water pokemon. Goldeen, Barboach (etc.)
No, you can not get Lucario in Mystery Dungeon Blue.
nope
lv up esey
Yes.
If you're talking about Pokemon Mystery Dungeon Explorers of Time or Pokemon Mystery Dungeon Explorers of Darkness, you can recruit as many Pokemon as you want. If you are talking about Pokemon Mysatery Dungeon Blue Rescue Team or Pokemon Mystery Dungeon Red Rescue Team, you can only recruit a certain number of Pokemon per friend area.
you can teach it to your Pokemon if it can learn it or you can sell it
No, you can not get Lucario in Mystery Dungeon Blue.
you can't trade on Pokemon mystery dungeon OK
It depends on what level it is on.
Yes there is a unknown dungeon in Pokemon blue mystery dungeon! You'll have to connect with your friends if you want to go there
buy it.
nope
No, only joy seeds are available in Mystery dungeon Blue and Red
yes all Pokemon evolve in Pokemon mystery dungeon blue rescue team after you beat Rayquaza and legendary Pokemon don't evolve.
lv up esey
Curently, Pokemon Mystery Dungeon: Blue Rescue Team is out and available all around the world.
No... there is no regigigas in Pokemon Mystery Dungeon Blue Rescue Team. Do you know why? If not... I will tell you. This is because regigigas is one of those new Pokemon from the sinnoh region which was not invented during the time of Pokemon Mystery Dungeon Blue Rescue Team. However, I believe you can find a regigigas in Pokemon Mystery Dungeon Explorers of Time, Darkness, and Sky.