Even though I'm playing soul-silver, an old man gave me a rainbow feather to summon ho-oh. I'm not arguing since ho-oh is my favorite legendary, but it's quite weird. Also after having stolen a poke puppet from a poke puppet robber a guy came up to me and said "Hey do you hate to roaming legendaries Raikou (have him) and Entei (don't have him yet)? Well here's Latios which you can chase for ever and never catch"