Can you like create games on Construct and port into formats for homebrew say like
the DS and the PSP?
No. It would be quite a large undertaking, so I don't think it's likely to happen.
Develop games in your browser. Powerful, performant & highly capable.
You'd be better set learning a programming language.
If there was an easy game creation kit for the DS, it would start to get tons of bad shovelware....
....oh wait
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