Logic Masters Deutschland e.V.

This puzzle was part of a 21-puzzle pack made for Martin Ender (Menderbug) during Christmas of 2023.
The full set is currently not publicly available yet, but I've picked out the mashup puzzles to share here
since they're a bit more interesting than the rest, which were simply vanilla logic puzzles.

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Technically A Double Choco Puzzle (Chocona x Choco Banana)

Chocona : Shade some cells. Any orthogonally connected group of shaded cells must be rectangular, ignoring the given region borders. No two rectangular group of shaded cells may touch orthogonally. Clue cells indicates how many shaded cell must be in the region that clue cell is in..

Choco Banana : Shade some cells to form groups of shaded and unshaded cells, such that every shaded group is rectangular, and every unshaded group is NOT rectangular. Clue cells indicate the size of the shaded or unshaded group that clue cell is in, ignoring the given region borders. Groups may contain multiple copies of the same number, or no number at all.

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Solve on Penpa+

For Penpa+'s answer checker to trigger, use the following modes:
- Surface -> Dark Gray or Gray