Heya Empoleon, welcome! Nice fave you have in Gengar, he surely is one of the more loved Pokemon out there due to being "the original Ghost Pokemon". I like cute Pokemon better though, but yeah opinions.
As Dragon suggested, why not check out the Fourth Generation section given you like that generation a lot. Platinum was definitely a great game, it fixed the major issues Diamond & Pearl had, and well Sinnoh was a pretty nice region in its own right. Once you've checked that out, do check out the rest of the forums and see what else catches your attention.
I hope you enjoy your stay and make new friends, and you can always contact the staff if you need any assistance. Everyone here is also really nice so you'll have no problem settling in. Have fun and see you around!
- Hikamaru