I don't know how you check if your DVD player is multi region to be honest. If you know what make it is, maybe you could google it and that would tell you - or read the instruction booklet if you can unearth it! DVRAB from England are region 2, so if you can play American DVRAB (region 1) you have a multi region player.
I have the Link doll (not the singing one) and the Penny doll, some Hairspray bookmarks, a load of posters, the promo DVD and a film cell display!