Clues (Almost Complete)
Thanks to @Deusovi (bold, in the chatroom) and @Stiv (italics, in the comments) for some of these answers, and for noticing that the answers should be...
...in alphabetical order!
*In Big Stadium in Nimbasa City, Ace Trainer Charlie has a Galvantula, and "Charlie's" fits alphabetically
**A Stradivarius is a type of violin, and violins don't have frets
***Technically the Pokémon's name is "Magnemite", but since "magnem" isn't a word, I think the intended word is "magnet"
The theme of this question is Pokémon for a few reasons. There are a lot of references to it in the clues/answers: Galvantula, Frufrou, Focus Blast, leaving with 1HP, Magnemite/Magneton, Nitro/Flame Charge, Spatial Rend, Farfetch'd, sprite. February 27 (emphasized by Hint 1) is Pokémon Day and the Pokémon franchise spans multiple years and generations! Not sure what kind of tale is being told though.... The colour scheme also resembles Pikachu's, which is relevant in the next section.
Obviously the rest of the clues need to be filled in. @Deusovi mentioned in the chatroom that the goal of the puzzle is to construct Pikachu using the pieces (without rotating them; notice the square pieces in different orientations). However, there isn't a piece long enough without rotating to cover the four cells "sticking out" in the eight-letter clue, so I think rotating might be necessary.
@Stiv had a similar idea in the comments, but wondered if the pieces, either when laid on the grid or when rearranged, would spell out the names of Pokémon (the "lax" in "relaxes" is remiscient of "Snorlax"). Taking a look at the four-letter Pokémon (Abra, Aron, Axew, Jynx, Natu, Onix, Sawk, Seel, Snom, Uxie, and Xatu, if you want to cross-check) with the I-tetromino, I couldn't find any possible matches, so if this is the case, it is probably post-rearranging.