All of the episodes were good.
Baby Mama Drama was really nice, but fans already knew how Alvin would suck as a parent. And I'm wondering how Eleanor or Theodore would come up with the name Salvador. I always notice the history or Spanish linguistic jokes, but I literally thought while watching it, did they name the doll after Salvador Dali or did they name it savior? I wasn't surprised that Eleanor or Simon were good parents to their dolls, as they act as a surrogate parent to their siblings.
Ballet Boys was all right, but I definitely didn't want to see the boys in spandex again. It kinda showed how hypermasculine Alvin's personality is, but I wonder why all three boys are on the football team. I liked Cheesy's joke about candy/protein bars, as it's so true. But, on a team with a bunch of teenaged boys, why would Alvin be the worst at sports nutrition? And how much protein does he need, as too much causes liver failure? Because protein bars have about 20-30g of protein, so I thought his cramps were from liver failure when I first watched it. And why did all of the boys get punished, when Alvin caused the distraction? And how can Alvin run without stretching? The lidocaine cream joke, while it wasn't meant to be a joke, ended up funny because it used the old people used Bengay trope.
The Wall was okay, it showed that only Alvin cared about popularity. The whole plot seems to be driven by Alvin thinking cute, as in sexually attractive, when the classmates used it in the sense that you would for a puppy. I didn't like how the girls are Alvin's assistants in this series, as it reminded me of Alvie's Angels.
In the beginning of Oh Brother Where Art Thou, it was nice to see the aftereffects of Alvin's own actions. It was also nice to see Theodore prank Alvin more subtly, but it was clear that the girls helped out. I wonder, was the prank the girls' idea, or was it Theodore's? It was nice to see that Alvin cared about Simon at least, but we'll never know to what extent. I only got the Star Wars reference (I have brothers, so watched action movies as a kid), and his lightsabre indicates the dark side, as jedis don't use that color. Shows that Alvin kinda has more negative than positive qualities. Second Star Wars reference in the series.