go to curelean city after defeating the gym leader then go back to the place where you got her to go back to her gym and then tou will find suicuin.
You find Suicune at Ceruluean Cape.
You can catch Pikachu in Route 2 in Pokémon Gold.
Not really it depends on the Pokemon's lv but if you use the right poke ball then it will be so much fricking easier to catch like at night use a dusk ball, a legendary needs a master ball , suicuin a net ball you get the point oh I forgot if your Pokemon is a higher lv then the wild one you've got a better chance of catching it.
You catch it.
In Pokémon Gold, you can catch Gligar in Route 45.
You can't catch Mewtwo in Gold, Silver, or Crystal. But you can catch it in HeartGold and SoulSilver in the Cerulean Cave at Lv70.
You can catch it in Route 2.
No.
you can catch one in the safari zone NOTE:they are hard to catch
Heart gold I think so gold no
Absol is not in gold, has never been in gold, and never will be in gold
you cant catch it in gold if its a boy you can catch it in blue if its a girl you can catch it in purple