Good choice of location to place Kricketot, the greens of the forest are good for contrasting against the bright red bug. Kricketot has been shown as the main focus of this image, so its centered sue to a lack of other important elements. I’d like to see more storytelling in your images. Kricketot is just standing there, looking off into the distance. Maybe give him something to be looking at, or another Kricketot to play with, something.
Kricketot looks fairly accurate, especially for the limited timeframe you had. Color, shading, and form are all right. The antennae could possibly use a bit more rounding. My only big question: How tall is this bug if he is standing right under the leaves of these trees? Seems a bit disproportionate at first glance, unless these are small saplings, then the scale of the trunk looks off.
I’m going to start by pointing out right now the one only problem I really have with your environment - the trees. Below the leaves you actually did a really nice job, giving the trunks some light detail to show imperfections and the vague appearance of bark, but the leaves kinda detract from that. The one thing that you need to do is either remove the leaves, as they really make Kricketot look really tall, or make them more natural than the rectangles they currently are.
As I said for the rest, in general I like the composition and simple environment you have here. the small tufts of grass, while fairly repeated, still make the grass more than a flat green plane for the pokemon to stand on. I see the Roggenrola rocks have made a comeback. The beach ball look is still there, but I do like that you cut some off to make them different, and used the darker part for another, just to make them unique in some way. The shading on your rocks and Kricketot are contrasting, but you did add shading. The rocks or pokemon would just need to be flipped for it all to be the same. Also, the trees would probably be creating shadows if the rocks and pokemon have sunlight hitting them.
1. Please, fix up those leaves. Even in paint you might be able to remove/repair them to be more natural or organic.
2. Perspective/scale - Kricketot and the trees seem to contrast in terms of the size of everything
3. Give images more story/content, instead of static poses with no action
I liked this one, it had some decent design choices for an easiest mon apart from those leaves, and its good for a time-limited image. Its yours.