I've been wanting to review this anime since I started it and now that it's done here is what I think of Pani Poni Dash.

We begin with ten year old Rebecca Miyamoto whose about to start a new job as a teacher at a Japanese High School, if you're wondering where you've heard that before, you may be thinking of Negima but Pani Poni Dash started in Manga format back in 2001, yes like Needless it's older than it looks.
On the way Rebecca is subjected to many strange things including a cat locked in a vending machine who hands out warm cans and claims he's god, Rebecca is also being spied on by Aliens who look like funky trash cans whose job in this series is just to spy on Becky and make snarky comments. Traveling with Becky is Mesousa, a horribly depressed bunny rabbit.
Now a game for anyone who fancies posting comments called trope bingo.
Episode one introduces most of the cast and by episode five we learn pretty much everyone so all you need to do is name ten character tropes without looking at TV Tropes and you win.
Back to the review, the students get very excited at the prospect of having a kid teacher so they mess around with her to the point that they scare her off behind the curtain. While there are plenty of characters in this series the ones were focusing on the most is Class 1C made of Rei, Himeko, Ichijo, Kurumi, Miyako & No.6 Sayaka.
From there we are subjected to the weird and wonderful the show has to offer in an Azumanga Daioh meets Excel Saga as painted by Roy Lichtenstein and that's where things start going off key.
A gag series needs to keep the jokes and references flowing constantly and can't afford to stop or repeat anything otherwise the characters will end up falling flat later on. Pani Poni Dash insists on going with running gags for 90% of it's content and suffers for it as a result.
Himeko's "Maho" (Ten times worst in the dub), Sayaka's "XY of the year", Kurumi's boring sulk routine, Miyako's shiny head and Mesousa's constant depression fall really flat when it's played out every episode with only Rei, Ichijo and Becky making an effort to diversify but even they fall flat sometimes when you fail to be surprised by them anymore (Which is strange considering how random Ichijo can be). This also extends to the rest of the cast apart from a few exceptions but still ultimately falling flat when they do their routine for the tenth time.
To put all that in more simple terms, it's like being told the same joke everyday, it gets less funny the more you hear it and by the end of it you just want to watch something else, this gets harder to watch when you're trying to catch references as well. I think ADV had Video notes but the version I got was a re-release so I've got the unfortunate task of re-watching the series to catch all the references.
You know what, I expected better from this series, especially when the art style is so attractive to watch; when you look back at it's senior shows Azumanga Daioh and Excel Saga you get the feeling that the creators watched both shows and then showed up at the meeting saying "combine these two!"
Final Verdict: I expected a lot more from this series considering how good the art style is; while it does keep you drawn in, the show can be tiring to watch and can easily become boring if watched constantly. I recommend for best viewing to watch one episode a week to stop it from becoming boring.