Funny "1.April" joke from @retrogamefan ?

Hello.Image may be NSFW.
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Yes i know its that shitty R4 clone junk:

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I have three of this one 2018 and two 2017.

A minute ago my wife turned the first DSi XL on and after booting into Ys Menu:

Image may be NSFW.
Clik here to view.

Same on the other 2 DSi XLs.Black/White screnn on Ys Menu. When booting a game all is fine,color is there.

Yesterday all is ok.Color IS there when I boot up to Healthscreen and into DSi Launcher.

First April joke from ...

Funny "1.April" joke from @retrogamefan ?