short answer yes.
Long answer: Yes but with intermediate level understanding of character creation and AI/Coding fundamentals.
Every mugen character is going to be a case by case scenario.
And also every character will have a varying level/type of AI implemented.
How a character is coded to respond to variables durng a fight will determine its behavior.
The way this is controlled is via AI in the case of a cpu controlled char like your use scenario.
In order to understand how this works, my suggestion is probably not the desired one as theres no quick fix.
I would suggest some research on character coding basics 101, in particular understanding 4 things: variables, Triggers, States & AI.
Once you have a basic understanding via video tutorials, the mugen Docs and some trial and error,you will start to understand how each individual char works and learn how to manupulate the code and AI to make it perform certain moves/ be in certain states as you require.
Without going to deep for example, a common way i assume this would be done is via a trigger linked to both the char AI level variable, remaining life meter, and available power meter.
When the conditions set via triggers in the AI coding activate the transformation state etc.
But yes in summary, it may be a pain and some grind in the short term to have to research and learn the basics first but the long term gain will pay off.