This gif pretty much sums up what Leon the Riolu has gone through since his creation~ Let's call it Leon-lution, or Fluffination, if you may haha! :3

May 2011: This is Leon's first, raw appearance, he was just a normal Riolu, nothing special here~

Feb 2012: Exposed to extreme cold weather, Leon's fur naturally stands up, making him look fluffier than usual. He also has his red bandanna~

May 2012: Leon starts to stylize his fur a bit, he also got all the scratches in his battles! Don't worry, they heal pretty fast~

Jan 2013: What Leon looks like now, he pretty much has gotten a lot more fluffs, he might need some trimming soon... which brings us to the next stage...

Jan 2045: Well... let's just say Vagus got trapped inside there as well...