Yes ou can, but only for PS1 games.
yes i use ps1 cords
no most are not unless you mean can you use the cheats on a PS game playing in the PS2
no
No, it doesn't I have tried it. But the stick you can use in PS2 U know that :)
no you can not
Yes.
yes
the larger ps2 you can ...yes not the slim ps2
yes, the ps1 controllers are dualshock, and the ps2 are dualshock2, so it may not be as good overall as a ps2 controller, but it should work
A PS game will play in the PS2. Not every title works and burned and foreign games mostly don't work
sadly not. although playstation 1 games will work on a playstation two console. the playstation two games feature software that the PS1 is not capable of processing rendering them unplayable on older consoles
Any PS2 wireless controller should be able to work on the PS1. A PS3 wireless controller will definitely not work on the PS2 and PS1, because they use Bluetooth as their wireless technology, whereas wireless PS2 controllers use 2.4GHz as wireless technology.