[X] Scared. More humans coming for you means more fights, and sooner or later you risk someone showing up who isn't stupid. Not a good thought.
[X] A wild mouse chase. Make them work for it. Lead them around the Forest by the nose, bedevil and beleaguer them at every step, until they turn around in frustration and give up.
[X] Silk-Choked Streets. With the threat of financial loss and humiliation on the table should they cross paths with you, trainers are sticking more and more to the most well-trod routes through the forest. But this has given silk-spinning Bug-types the opportunity to thrive elsewhere, and many paths through the Forest are now all but impassable.
I think all of these Forest options are going to push Trixie more towards the cities, in various ways unique to each. All of them are going to cause some kind of external response because 1) the Forest is part of the lives of everyone in Pewter and Viridian and cause some kind of inconvenience for the humans, 2) for the story to progress we have to push her into new and interesting situations which any of these would cause.
The Migration threat is going to need response from one of the two Gym leaders, presumably the Pewter one if Plague of Pests mentions Viridian. It'd be interesting to poke Rock-types more if someone from up there does come here, and they also do well against Bug-types. Wonder if we would get to meet Shino from the Pewter Gym if we went that way.
Plague of Pests specifically mentions Viridian which is in the direction of Pallet Town, Ash, and whoever runs the Viridian Gym nowadays. As EarthScorpion also notes this might specifically get her playing around in Viridian City in particular which would be fun.
Silk-Choked Streets is I think a case of the forest itself starting to be hard for Trixie to move through. This will force her to move onto the more commonly used roads, like the trainers are forced to, though obviously to a somewhat lesser degree. This pushes her to interact with those trainers, while some of them go and complain in Viridian and Pewter. I have a feeling that people that are neither from Pewter or Viridian do pass through the forest, but Trixie hasn't met them much. But, if she is forced to interact with more trainers more often she might run into some and that's a fun thought.
I like the idea of making them, whoever they are, work for it with wild mouse chase. Coupled with Silk Choked Streets I think that sort of shapes a scenario of her dipping in and out of the more dangerous areas as she plays with the trainers, and those who really want it follow her into the webs. And get the logical consequences of that decision, which should be hilarious, until someone persistent enough and smart/calm enough to become her friend comes along.
Scared then I like as an option because its a sensible one. She got her ribs broken for this, and that hurts. Fear is entirely reasonable, and I'm hoping this sort of choice plus what happened might encourage her to maybe not give up a chance to hit her opponents like she had. Though as noted the Machop was faster, so its more of a case of what I want being her to slightly alter her approach to fighting as a whole so she gets into less situations like this.
Put all together I'm hoping these three things put her under pressure in a very specific way and she gets to meet some interesting people.
