"We have (this series) at home" anime. (Cheaper, budget versions of other more popular anime)

Flame of Recca to Yuu Yuu Hakusho.
https://myanimelist.net/anime/2786/Bakegyamon to pokemon.
https://myanimelist.net/anime/2608/Wangan_Midnight to Initial d.
Sonic X to Dragon ball z.

I'd say Monsuno is a knock-off of Bakugan as it copies a lot of the same mechanics, especially the toy side of it. Also obviously there's many monster battling anime that you could say are knock-offs of Pokémon and they'd probably all apply, although I think Monster Rancher is at least the worst one and the one that leans heaviest towards copying Pokémon (that I've seen so far)

Puni Puni Poemi and Bludgeoning Angel Dokuro Chan feel like "excel saga at home"

@Sasori56483

I'd argue Sonic X is more "Dreamcast Sonic at home" since the anime adapts 3 arcs from the games (SA1, SA2, and Sonic Battle) but not in the best way. They actively gutted one of Amy's most important character moments in SA2 for the show by giving to Chris (the added child OC for the show) and it makes me actively upset to basically see the show make Amy a side character in a scene where SHE was the driving force in the plot for once. I feel a lot of the "Sonic is just DBZ" comparisons are very loose when you compare the actual plots and character arcs beyond just the surface level stuff.

Rahxephon to Evangelion.

In general the Japanese are not prone to doing brazen imitations or knockoffs like the Chinese.

Shinmai Maou no Testament is High School DxD at home.

@Valyrian1124 I feel like though they are similar, RahXephon takes a different enough style to not feel like a ripoff

Rahxephon to Evangelion.

In general the Japanese are not prone to doing brazen imitations or knockoffs like the Chinese.

@Guilmon1

Rahxephon inspiration came from Brave Reideen of 1975. Typical ignorant western fan as always.

@SPTLayzner I know but RahXephon still can feel similar plot wise to evangelion

@Guilmon1 The mystical element in Rahxephon is a reference to the ancient and lost civilization of Mu and Atlantis following the story of Reideen. Izubuchi love the mystical element of Reideen especially the first half directed by Tomino so he wanted that element in Rahxephon. Also Izubuchi are basically friends with Anno and have work together. Izubuchi was also requested by Tomino to do the Mecha design for Brain Powered but some design were not gonna be use so he took and store the design, those design ended up as Rahxephon.Prince Sharkin of Brave Reideen, Prince Garuda of Combattler V, Prince Heinel of Voltes V and Admiral Richter of Daimos are the prototype for Char Aznable

@Valyrian1124 Because it not, Rahxephon was inspired by Brave Reideen from 1975. Directed by Tomino and later Tadao Nagahama. Imagine calling it knockoff when you are ignorant of its history.

@SPTLayzner
The Dandelion Girl was written in 1961, before even Raideen.

@Lucifrost Yes, It was more of a simplify explanation. The ones who insist on calling it Eva ripoff wont even know what you talking about if you throw in Dandelion girl mix Brave Reideen.

@SPTLayzner
You think so? Kotomi quotes The Dandelion Girl in Clannad.

@Lucifrost To understand Kotomi quotes and the girl in question in Rahxephon, one would need to show interest and search up the short story to read. As we known the Eva, Gurren and Geass crowd are known to write off stuff they easily deem not worth. There are actually Clannad fans who don't known where the quotes came from. Mecha influenced by Sci-Fi literature is very common but the eva , gurren and geass crowd refuse to acknowledge it. For them the whole genre is just robot fighting.