Japanese Konami titles translated in English

Wanpaku means rudeness or puppyish. Generally Japanese people use this word to express cobby boys.

いち, に, さん are pronounced Ichi, Ni, San. They mean one, two, three.
さんすう means arithmetic as one of subjects in primary school.
いち・に・さんすう is a very popular equivoque. Children learn one-two-three in an arithmetic class in school.

Now it's time to go for me. Let me explain the others later...

I've just been back with released from a dull business task.

At first, an additional topic. I'm sure you know the title of Yie Ar Kung-Fu. This name comes from an equivoque similar to いち・に・さんすう.
yi, ar, san, si mean one, two, three, four in Chinese. Yie Ar Kung-Fu matches rhyming words to yi-ar-san-si, or one-two-three-four.

gdx is correct. Let me add one more thing. The whole onomatopoeia is pon-pokko-pon. Here you can also see an equivoque between Pan (means bread, it is called Pan in Japan after Portuguese language) and the last Pon.

The whole title is a parody of Emperor Strikes Back, the episode V of Star Wars.
The name of emperor; Eager, comes from a secret language used in a popular Chinese restaurant named Gyoza no Oh-Sho (餃子の王将). When somebody orders a jiao-zi there, a staff shouts to the kitchen "i: ga: koh ter". This secret language is just quasi-Chinese language. It sounds like イーガー皇帝 to Japanese ears. This phrase is very famous among Japanese people, so Konami seems to have picked it up as their game title.

All of 魔城, 夢大陸, 悪魔城 are not general nouns, but combination terms or neologisms.

魔城 and 悪魔城 have the almost same meaning. We Japanese generally understand these phrase as "terrible castle". I dare to free-translate them to English.

魔城伝説 -> The legend of battle in terrible castles
悪魔城ドラキュラ -> Dracula in the terrible castle

夢大陸 is a combination term from 夢 + 大陸. 夢 is dream, 大陸 is continent. So 夢大陸 means dreamy continent or dreamlike continent. Therefore the title should be translated as the adventure in dreamy continent.

This title is the most difficult to explain to non-Japanese people. The word "sensation" in such titles for Japanese doesn't have any meaning in most cases. Japanese creators often use this word without careful thought. So I dare not to translate the word. I mean the title should be called Konami's fortune-telling in English.

魔城 and 悪魔城 don't really mean "terrible castle" -- they're more like "Demon's Castle" and "Devil's Castle" (if I had to translate the two differently, those would be the two translations I'd use). 魔城伝説 also doesn't have the word "battle" in it at all -- it's literally something like "Legend of the Demon's Castle." Whereas 悪魔城ドラキュラ is just "Devil's Castle Dracula" -- it's a little awkward even in the Japanese, TBH, as it kind of makes it sound like Dracula is the name of the castle, not the person in it.

As for コナミの占いセンセーション, the word "sensation" in this case definitely means "a sensation," as in something wildly popular. Like, "The Beatles were a real sensation in the '60s." So it's literally trying to make it sound like fortune-telling is SUPER-COOL.

Also, for わんぱくアスレチック, I feel like none of the translations noted here so far quite got the nuance of the word わんぱく, which I'd say is best translated as "mischievous," or even "naughty" (in the non-sexual sense).

-Tom

I actually didn't realize you were Japanese, despite the username! Sorry about that.

Part of the reason I felt the need to correct you, though, is simply because I don't think "terrible" is the word you want in English. "Terrifying," maybe? When you say "terrible castle," the implication that has to me, as an American, is "subpar castle," or "unimpressive castle." It's terrible, as in, it's not up to proper standards! Despite being derived from the same root as the word "terror," the word "terrible" doesn't really have any sense of fear or scariness attached to it in common usage -- it just means "really bad." And not bad as in "evil," but bad as in "not worth your time."

I deal with these kinds of nuances all the time, since I'm currently employed as a Japanese-to-English translator and editor for a video game publisher, so please forgive me if my corrections came/come across as rude or condescending; I mean absolutely no disrespect. I seek only to educate, and to ensure that people have the best possible experience in translation.

-Tom