Do you write sequels to your fan fictions?
Yeah. Secret People, at least. I have a tendency to get too attached to my characters to really quit writing about them.
Do you write side stories to your fan fictions? -- Not direct prequels/sequels?
Well, yeah, but none of those has actually seen the daylight yet. I started one oneshot about Cimi's cousin and a girl he meets in a train, but I haven't worked on that in a while. Then, I have to note here, that all my fics kind of tangle together. They happen in the same region, different characters have cameos in other fics... For example, Adan from JtIoJ (I need to come up with names that make better shorts) and Secret People used to live next door to Jack from Mama's boy, so Jack really looks up to him and even mentions him a couple of times. Moreover, Jack and Cimi (JtIoJ, SP) is actually remotely related to Jack and Lilian... Oh yeah, I like to mess things up. So, actually, all my fics are kind of spin-offs or side stories of each other.
What's your stance on the subject of "made-up" moves for fan fictions? blah‑blah‑woof‑woof and what not... , but the more specific, original, and/or complex movements, like let's say, PASBL–style "Signature moves".
I don't usually make up any moves unless I have a made-up Pokémon, and that has only happened once this far. I am, however, completely fine with made-up moves if they are sufficiently described and not some über-kickass "Sephiroth's meteor" kind of moves that destroy the opponent completely in one strike. Also, I feel that the moves should fit the Pokémon - canon or self-made. I don't want to read about a Sentret using some Dark-type Mega Explosion Ultra HP-Absorb Hyper Beam. In fact, I don't want to read about a move like that at all...
But, yeah, I think you get the picture. As long as at least some common sense is used with the made-up moves, they're fine by me. I don't really use them a lot myself, though.