It's a part of an album called "Touhou En Strike" by Cool&Create, a circle that mainly dabbles in arrangements of Touhou game music. This circle's style is very upbeat. I recently mail-ordered another album of them, "Touhou Strike", which contains some of the songs of the former-mentioned album, but sadly not "Night of Nights". I remember the Floarama town theme! I haven't played Pokemon ever since Pearl and Platinum. Is this theme in triple time? A very tranquil theme.