From Nico Nico Douga: http://www.nicovideo.jp/watch/sm22207031
This certainly made me smile. Dat Kairiki though.
This is the original Digimon Adventure opening, by the way: http://www.youtube.com/watch?v=6sGsBgm1EMg
Here's a really well-made fan trailer of the first Pokemon film (kanzenban edition), uploaded by a Japanese fan on Nico Nico Douga. It's intended to be a tribute to Takeshi Shudo. 【MAD】ミュウツーの逆襲 偽ＰＶ（再々うｐ） ‐ ニコニコ動画:Q
You could watch it here, though it takes a few seconds for the video to start. Nico Nico Douga itself has English as a language option now (at the bottom), so making an account there to watch videos shouldn't be too hard. I tried to upload the video onto
Updated 17th July 2013 at 08:15 PM by FANG-TAN
Now to share an awesome parody of the Shingeki no Kyoujin/"Attack on Titan" opening, using scenes from Mewtwo Strikes Back.
And also, an alternative one. Shingeki no Myuutsuu (Shingeki no Kyoujin × Myuutsuu no Gyakushuu)
Updated 21st June 2013 at 12:49 PM by FANG-TAN
OK, these videos that I found are friggin' awesome if you're a Red or a Satoshi fan. A good example of how much a character can steer away from their origins, yet can still be made awesome, in some way.
Updated 21st June 2013 at 12:56 PM by FANG-TAN
I found something totally awesome, but I'm apparently not allowed to share weird moonspeak openly on the forum with the English fandom. So I'll just assume people are actually going to see this posted on this blog even though it's probably going to get pushed to the last page. lol
Some cool people over at Nico Nico Douga decided to take a random unrelated song and change the lyrics so it would be all about Pokemon Trainer Red from RGBY/GSC/FRLG/HGSS and his time as a master trainer