AmI the only one who thinks that these are slightly wrong? Do't get me wrong they are good but head swaps are a bad thing cos they can become dissproportionate to the body, They also look a bit awkwardly placed e.g manectric. Look at someo other peoples sprites and you will see how they take bits like the tail or ears and mix those, it is more subtle but very effective. Try some different pokmon to cos about the only thing you can do with trapinch is a head swap so try different pokemon and see what they are like.
You have great potential so keep it up.