La ronda incluye una penalización y un comodín.

Because the subject is la ronda, which is singular: the round.
So the verb must also be singular:

• La ronda incluye = The round includes
• Las rondas incluyen = The rounds include

Even though there are two things being included (una penalización y un comodín), the verb agrees with the subject (la ronda), not with the things that come after it.

Incluye is the third-person singular present tense of incluir (to include).

So:

• yo incluyo = I include
• tú incluyes = you include
• él / ella / usted incluye = he / she / you include

In this sentence, it matches la ronda:

• La ronda incluye... = The round includes...

Spanish usually repeats the indefinite article when listing countable singular nouns.

So:

• una penalización = a penalty
• un comodín = a wildcard / joker

Using the article before each noun sounds natural and correct in Spanish. It is similar to English saying a penalty and a wildcard.

Also, the article changes because the nouns have different grammatical genders:

• penalización is feminine → una
• comodín is masculine → un

You usually learn noun gender together with the noun.

In this sentence:

• la penalización → feminine
• el comodín → masculine

A helpful clue is that many nouns ending in -ción are feminine:

• la penalización
• la canción
• la decisión

For comodín, there is not such a strong ending pattern, so it is best to memorize it as el comodín.

Comodín often means a wildcard, joker, or something that can be used flexibly depending on the game or context.

Common uses include:

• in card games: joker
• in board games or game rules: wildcard
• figuratively: a useful backup option or something versatile

So in this sentence, it probably refers to a special game element that can be used in a flexible way.

Spanish normally uses y for and:

• penalización y un comodín

It changes to e only before words that begin with an i sound:

• padre e hijo
• España e Italia

But un comodín does not begin with an i sound, so y is correct.

The personal a is used mainly before specific people (and sometimes pets or personified beings) when they are direct objects.

Here, the objects are things:

• una penalización
• un comodín

So no personal a is used.

Compare:

• Veo a María = I see María
• La ronda incluye una penalización = The round includes a penalty

Yes, La ronda incluye una penalización y un comodín is completely natural.

It follows a very common Spanish pattern:

• subject + verb + objects

You could change the wording slightly, but this version is straightforward and idiomatic. For example:

• La ronda tiene una penalización y un comodín = The round has a penalty and a wildcard

However, incluye often sounds a bit more like contains / includes as part of it, which may fit game rules especially well.

It is pronounced approximately peh-nah-lee-tha-THYON in much of Spain, or peh-nah-lee-sa-SYON in areas that do not use the th sound.

The written accent in penalización shows where the stress goes: the final syllable -ción.

So the stress is on:

• pe-na-li-za-CIÓN

Approximately:

• in Spain: ko-mo-DEEN

The written accent on í shows that the stress falls on the last syllable:

• co-mo-dín

Without the accent mark, the stress would be different, so the accent is important.

Yes. Ronda has several meanings depending on context, including:

• round in a game or competition
• round of drinks
• patrol
• round / circuit in some other contexts

In your sentence, because of penalización and comodín, the round in a game or rule-based activity is the most likely meaning.

It is mostly regular in many forms, but it has a spelling-related pattern and some forms that learners should notice.

For the present tense:

• incluyo
• incluyes
• incluye
• incluimos
• incluís
• incluyen

Notice the y in several forms: incluyo, incluyes, incluye, incluyen.

So it is not fully regular in the simplest sense, and it is worth learning as its own pattern. Still, in this sentence, you only need to recognize incluye as includes.