Some more updates.
I not sure if this is Pachypodium ambongense or Pachypodium lamerei.
I want to keep all my succulents as miniature to medium bonsai.So I prune them to get the shapes I want.
I cut the top off to force it to branch. Here are some before and after pics.
Before:
After:
Here are some pics of the caudexs on my two Euphorbia ambovombensis seedlings.
And here is a shot of my Euphorbia suzannae-marnierae seedlings.