1. **Introduction of the Game:**
My Talking Tom 2 is an engrossing virtual pet game developed by Outfit7 Limited that allows players to adopt a kitten named Tom and take care of him. As a sequel to the beloved My Talking Tom game, it offers a multitude of interactive features, mini-games, and elements of daily pet care, providing a fun and nurturing experience for players of all ages.

2. **All Characters and Levels of the Game:**
Players are primarily engaged with Tom, the lovable talking cat who reacts to player's touch and voice. Aside from Tom, there are several other characters like Angela, Hank, Ben, and Becca, which can be interacted with in mini-games or through other game features. As for levels, the game does not follow a traditional leveling system but rather focuses on Tom's growth and the unlocking of new items, activities, and areas as players progress.

3. **What Attracts Users Most to the Game:**
Users are most attracted to My Talking Tom 2 because of its entertaining interactions with Tom, where the cat replicates the user's voice in a humorous high-pitched tone. The game's charm is also in its high-quality animations, various mini-games that maintain engagement, and the nurturing aspect which creates an emotional connection between the player and Tom.

4. **Why It Is Popular:**
My Talking Tom 2 has gained popularity due to its combination of interactive pet simulation, user-friendly interface, and the endearing personality of Tom himself. The game's appeal is broad, capturing the hearts of both children and adults with its simplicity and the joy of caring for a pet without real-world responsibilities. It's a recognizable brand that also capitalizes on players' nostalgia from its predecessor.

5. **When the Game Was Released and How Many Versions Are Currently Available:**
The game was released on November 3, 2018. As for versions, there is one primary release of My Talking Tom 2, but it has been regularly updated with new content, features, and improvements since its initial launch. The frequency of updates ensures that players always have something new to explore.

6. **The Most Difficult Part of the Game:**
The most challenging aspect of My Talking Tom 2 can vary depending on the player, but many find keeping up with the increasing needs and desires of Tom as he grows more demanding over time. Balancing these needs while engaging in mini-games to earn coins for buying food, outfits, and furniture can be particularly challenging.

7. **Strengths and Weaknesses of the Game:**
Strengths of My Talking Tom 2 include its engaging content, variety of mini-games, high-quality graphics, and its appeal to a broad audience. The game is also regularly updated with fresh content. However, the game's weaknesses may include repetitive gameplay and reliance on in-app purchases for faster progression which might not be appealing to all players.

8. **What Other Games Have Been Developed by the Same Developer:**
Outfit7 Limited, the developer behind My Talking Tom 2, is known for its popular series of Talking Tom and Friends apps and games, which include My Talking Angela, Talking Tom Gold Run, Talking Tom Hero Dash, and many others. These games also center around the Talking Tom characters and offer various interactive experiences.