Besides the three sizes (25cm, 17cm and 12cm) there are three feature variations for Germanchu plush that occur in all combinations:
- dar vs. /light brown color for the ears and paws
- big vs. small eyes
- smiling mouth, normal mouth or no mouth at all
This picture by Gin (denkimouse) shows all size variations.
There are two medium sized Germanchus with light brown colors and small eyes, one of them has a smiling mouth and the other one no mouth at all. The third medium sized plush has dark brown colors, a normal mouth, but big eyes (belly and cheeks are added on and not part of the original plush).
This is my own Germanchu. It has a dark brown color and the same big eyes, but opposed to Gin's Raichu, it has an open mouth.
Here is another photo I found on the net. This appears to be the same plush as mine. Though I don't know which size it is.
Another Germanchu that looks the same from pikabulbachu that now belongs to evilsockferret:
It seems that the medium sized Germanchu with dark brown mostly occurs with big eyes and an open mouth, whereas the light brown colors tend to cooccur with small eyes and no mouth.