Could the multiverse theory or other dimension theory explain dark matter and dark energy?

Lol, that word "could" is becoming a favorite in astronomy these days. Apparently if something has a 0.00000000000000000000000000000000000000000001% chance of being true, then in astronomy parlance it is said that it "could" be true.

So with that in mind, and despite the fact that no evidence has ever been found that there is more than one universe, or more than the standard three dimensions, plus time, and that even dark matter and dark energy are nothing more than placeholders to explain anomalous observations, then one has to say, in all jocularity, that indeed other universes and other dimensions "could" be the explanation.

Think of dark matter as the new "luminifous ether" or the modern incarnation of phlogiston and you get the general idea.

In one sense, it could... While we term gravity as a very 'weak' force in our universe, it could be part of another universe where it's very strong, and what we feel is something of a 'shadow' from that universe. 

Dark Energy acts in some ways similar to a gravitational field - while astronomers discovered long ago the universe was expanding, it was a surprise when it was detected to be *accelerating*... in one sense, that's similar to 'falling' toward a gravitational field, where acceleration is expected. 

While a 'multiverse' may not be necessary to explain all the aspects we see in our universe, at least *a few* other universes could be necessary...

That isn't known. We don't know what either dark energy or dark matter are, or how universes would interact with one another if at all.